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WINNER |
| 2007 | Titan, Ben Bova
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| 2006 | Mindscan, Robert J. Sawyer
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| 2005 | Market Forces, Richard Morgan
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| 2004 | Omega, Jack McDevitt
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| 2003 | Probability Space, Nancy Kress
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| 2002 | The Chronoliths, Robert Charles Wilson
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| (tie) | Terraforming Earth, Jack Williamson
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| 2001 | Genesis, Poul Anderson
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| 2000 | A Deepness in the Sky, Vernor Vinge
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| 1999 | Brute Orbits, George Zebrowski
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| 1998 | Forever Peace, Joe Haldeman
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| 1997 | Fairyland, Paul J. McAuley
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| 1996 | The Time Ships, Stephen Baxter
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| 1995 | Permutation City, Greg Egan
|
| 1994 | no award
|
| 1993 | Brother to Dragons, Charles Sheffield
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| 1992 | Buddy Holly Is Alive and Well on Ganymede, Bradley Denton
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| 1991 | Pacific Edge, Kim Stanley Robinson
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| 1990 | The Child Garden, Geoff Ryman
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| 1989 | Islands in the Net, Bruce Sterling
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| 1988 | Lincoln's Dreams, Connie Willis
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| 1987 | A Door Into Ocean, Joan Slonczewski
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| 1986 | The Postman, David Brin
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| 1985 | The Years of the City, Frederik Pohl
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| 1984 | The Citadel of the Autarch, Gene Wolfe
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| 1983 | Helliconia Spring, Brian W. Aldiss
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| 1982 | Riddley Walker, Russell Hoban
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| 1981 | Timescape, Gregory Benford
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| 1980 | On Wings of Song, Thomas M. Disch
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| 1979 | Gloriana, Michael Moorcock
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| 1978 | Gateway, Frederik Pohl
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| 1977 | The Alteration, Kingsley Amis
|
| 1976 | no award
|
| 1975 | Flow My Tears, the Policeman Said, Philip K. Dick
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| 1974 | Rendezvous with Rama, Arthur C. Clarke
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| 1974 | Malevil, Robert Merle
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| 1973 | Beyond Apollo, Barry N. Malzberg
|
| |
RETROSPECTIVE PRIZE |
| 1976 | The Year of the Quiet Sun, Wilson Tucker
|
| |
SPECIAL AWARD FOR EXCELLENCE IN WRITING |
| 1973 | Dying Inside, Robert Silverberg
|
| |
NONFICTION BOOK |
| 1974 | The Cosmic Connection, Carl Sagan
|
